ISO 15609-2:2019

Overview

ISO 15609-2:2019 is an international standard specifying requirements for welding procedure specifications (WPS) related to gas welding processes on metallic materials. This standard details how to prepare comprehensive and qualified welding procedure descriptions to ensure consistent, high-quality welds. Part of the broader ISO 15609 series, ISO 15609-2 focuses specifically on the critical variables influencing weld joint quality in gas welding, providing a structured framework to document and qualify welding procedures systematically.

This 2019 edition supersedes the 2001 version, incorporating technical updates including additional parameters for joint preparation, welding techniques, and temperature control. ISO 15609-2:2019 aligns with related ISO standards covering welding processes, materials classification, and welding terminologies, ensuring integration within international welding quality management systems.

Key Topics

• Welding Procedure Specification (WPS) Content
  Defines mandatory elements to record in a welding procedure specification, including:

  • Manufacturer and procedure identification
  • Base metal type and dimensions
  • Welding process details according to ISO 4063
  • Weld joint design and assembly configuration
  • Welding positions following ISO 6947
  • Joint preparation and cleaning methods
  • Welding techniques such as torch orientation and pass sequence
  • Back gouging and backing support specifications
  • Consumables data including type, brand, and handling
  • Flame parameters (bore size, gas types and pressures, flame type)
  • Automated and mechanized welding parameters where applicable
  • Preheat, interpass, and post-weld heat treatment temperatures and procedures

• Quality Influence Variables
  Highlights critical variables that affect weld quality and consistency, guiding manufacturers to control these parameters within defined limits.

• Documentation and Qualification
  Emphasizes maintaining traceability through clear DMOS (Descriptif de Mode Opératoire de Soudage) documentation and referencing qualification records (PV-QMOS).

Applications

ISO 15609-2:2019 is essential for industries utilizing gas welding techniques for metallic materials, including:

• Manufacturing Sectors
  Fabrication industries requiring stringent control of welding procedures for components like pipes, pressure vessels, and metal structures.

• Construction and Infrastructure
  Ensuring safety-critical assemblies meet quality standards by standardized welding documentation.

• Quality Assurance and Compliance
  Facilitates compliance with international welding quality management systems and regulatory requirements.

• Welding Procedure Development
  Guides welding engineers and technicians in creating and qualifying gas welding procedures with consistent repeatability and documented parameters.

• Training and Certification
  Supports training programs by providing a clear framework of welding procedure requirements and best practices.

Related Standards

ISO 15609-2:2019 works in conjunction with the following standards to provide a comprehensive welding quality framework:

• ISO 15607 – General rules for specification and qualification of welding procedures for metallic materials.
• ISO 4063 – Welding and allied processes - nomenclature and numbering.
• ISO 6947 – Welding and allied processes – welding positions.
• ISO/TR 15608 – Guidelines for grouping metallic materials for welding purposes.
• ISO 13916 – Measuring preheat, interpass, and post-weld heat treatment temperatures.
• ISO/TR 25901 series – Welding and allied processes – vocabulary and terminology.

Practical Value

Adopting ISO 15609-2:2019 ensures:

• Standardization of welding procedures, reducing variability and enhancing reproducibility in gas welding operations.
• Improved weld quality and safety through precise control of welding parameters and environmental variables.
• Clear communication and documentation for manufacturers, inspectors, and clients, facilitating audits and certifications.
• Flexibility across materials and joint types, addressing a wide range of industrial welding scenarios.
• Support for mechanized and automated gas welding, integrating advanced welding technologies within procedural specifications.

For anyone involved in gas welding, ISO 15609-2:2019 provides a definitive guide to documenting and qualifying welding procedures, promoting international harmonization and reliability in welded metal assemblies.

For access to the full standard and official interpretations, visit the ISO website.